ack 1.96: Highlighting submatches only?

[Raffaele Ricciardi]

Hello there,

I'm trying to search for a pattern (mostly) outside line comments in Emacs Lisp,
where line comments start with a ; (semicolon). I'm running Ack like this:

ack --elisp --match "^[^;]*(pattern)"

So far, so good.  However, Ack highlights the whole match, whilst I'd like only
the submatch I'm looking for - eg "(pattern)" to be highlighted.  I can't find
any option to do so.  Is it possible?

Thank you.  

[Andrew Black]

Hi Raffaele
I know of know such option but...

If you are on Perl 5.10 or later you can use the \K metacharacter
    ack "^[^;].*\Kwant"
    2:this is wanted

My inital suggestion was to use a lookbehind but that doesn't work because it would have to be variable length.

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[Raffaele Ricciardi]

Solved.  Thank you.

On Sunday, August 5, 2012 3:44:21 PM UTC+1, Andrew Black wrote:

Hi Raffaele
I know of know such option but...

If you are on Perl 5.10 or later you can use the \K metacharacter
    ack "^[^;].*\Kwant"
    2:this is wanted

My inital suggestion was to use a lookbehind but that doesn't work because it would have to be variable length.

On 5 August 2012 12:45, Raffaele Ricciardi wrote:

Hello there,

I'm trying to search for a pattern (mostly) outside line comments in Emacs Lisp,
where line comments start with a ; (semicolon). I'm running Ack like this:

ack --elisp --match "^[^;]*(pattern)"

So far, so good.  However, Ack highlights the whole match, whilst I'd like only
the submatch I'm looking for - eg "(pattern)" to be highlighted.  I can't find
any option to do so.  Is it possible?

Thank you.  

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